diff --git a/requirements.txt b/requirements.txt
index 8bd1509..35776a5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -76,7 +76,7 @@ pydocstyle==4.0.1
 pyeda==0.28.0
 pyflakes==2.1.1
 PyForecastTools==1.0.1
-Pygments==2.4.2
+Pygments==2.7.4
 pyparsing==2.2.0
 pypblib==0.0.4
 pyrsistent==0.15.7